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5.4×0.68+3.4×2×0.46简便计算
人气:148 ℃ 时间:2020-01-28 00:06:33
解答
5.4×0.68+3.4×2×0.46
= 5.4×0.68+6.8×0.46
= 0.54×6.8+6.8×0.46
= 6.8×(0.54+0.46)
= 6.8
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